GLOCK. The simple design leads to fewer problems. Sigs are very finicky. When I am running the range at my full time gig I sure see a lot of malfunctions with the Sigs "not the right ammo, not enough oil" are always the excuses. Glocks will eat what you feed them and run bone dry. That's what you need in a self defense tool, not pretty looks. My 2 cents based on hundreds of shooters on the range. Sigs are also considerably heavier for a carry weapon.